M. Vijayan Unni
1946
1991 census hand book- 1991 census handbook
- All-India town directory
- Andhra Pradesh District profile, 1991
- Arunachal Pradesh District profile, 1991
- Assam state district profile, 1991
- Bihar state district profile, 1991
- Civic and other amenities in the notified slums of class I & II towns, India
- District census handbook
- Female age at marriage
- Goa State District profile, 1991
- Gujarat state district profile, 1991